Rotary take-up.



' A A. MERRITT.

ROTARY TAKE-UP. APPLIOATION FILED 1111.12, 1910. RENEWED AUG. 1, 1912.

Patented Oct. 15, 1912.

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DLUIBIA WRAP" U WAS" Nuro A. A. MERRITT.

I ROTARY TAKE-UP.

APPLICATION 211.111) JAN. 12, 1910. RENEWED AUG. 1, 1912.

1,041,715. Patented 00t.15,1912.

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UNITED STATES PATENT onnion.

ARTHUR A. MERRITT, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO WILLCOX 86GIBBS SEWING MACHINE COMPANY, 01?.NEW YORK, N. Y., A CORPORATION OF NEWYORK.

Specification of Letters Patent.

ROTARY TAKE-UP.

Original application filed December 12, 1908, Serial No. 467,163.Divided and this application filed. January 12, 1910, Serial No.537,685. Renewed August 1, 1912. Serial No. 712,776.

The present invention, which relates to improvements in take-ups, willbe readily understood by reference to the illustratlon in theaccompanying drawings of what was at the time of filing the aforesaidapplication regarded as the preferred embodiment thereof. 7

In said drawing, Figure 1 is a sectional view through a portion of asewing machine including a take-up of the present invention; Figs. 2 to5 are views of the take-up,

Fig. 2 being a front elevation looking from the right in Fig. 4:, Fig. 3a plan view, Fig. A a section on line 44 of Fig. 2, and Fig. 5 a sectionon line 5+5 of Fig. 2; Fig. 6

showsfthe parts of the take-up separated;

and Figs. 7 to 10 inclusive are a succession of views, each partly insection, showing relative positions of the take-up and the needles atdifferent stages of the stitch-forming operation.

Figs. 1 and 7 to 10 illustrate the take-up of this invention as appliedto a sewing machine of the character fully described and illustrated inthe aforesaid original application of which the present is a division.651 is a part of the bridge portion of'the frame-work of such a machine.Fig. 1 shows a bracket or frame 650 secured to the upper surface ofbridge 651 and supporting a thread-guide 659 and thread-tension disks660. A single cross-thread 6 passes inward through the eye ofthread-guide 659, around the spindle of tension disk 660 between saiddisks, outward through the eye of said thread-guide 659, downward to aset of thread-guiding hooks 671, over the take-up of the presentinvention, and thence to another set of thread-guiding hooks 672. Thebracket 650 also supports a plate 657 having therethroughthread-passages 658, and a set of thread tension plates 653. The fourneedle threads at, only two of which are shown in Fig. 1, pass throughthe thread passages 658, between the tenslon-plates 653,

to the upper set of thread-guiding hooks 671, over the take-up, andthenceto the lower set of thread-guiding hooks 672.

As illustrated herein, the present invent1on is embodied in a doubletake-up, one part for acting on the cross-thread b and the other partfor acting on the four needle threads a. The needle-thread take-upcampart 695 is integral with a hub 689, into which a set screw 690 isthreaded securing it to the shaft 80. Around this hub side orflange-plates 691 and 688 are sleeved. Grossthread cam-part 692 hasanopening or recess which fits around hub 689. A flange plate 694 isalso sleeved on the hub and screws 696, 696, passing through plate 691and body part 695 are threaded into nuts which are set in countersunkopenings through plate 694 and project therethrough into recesses incam-part 695. Thus the plates 694C and 691 are'firmly secured to campart695. In like manner, screws 693 pass through plate 688 and cam-part 692and engage with nuts which extend through countersunk openings in plate691, and secure plate 688 and cam-part 692 to plate 691. There is thusprovided at the bottom of the relatively narrow groove between theplates 688 and 691, a cam-like surface which acts upon the cross-threaddrawn thereover. A curved plate 697 is secured at one end in a recess incam-part 695 by a screw 698; its other end projects beyond the body partin the form of a series of tapered fingers 700 separated by four notches699 for the four needle-threads respectively. A flat spring 701 isinterposed and secured at one end between plate 697 and body part 695,and bears along and against the under side of fingers 700, its free endterminating at about the ends of the fingers. There is thus provided inthe groove between the plates 691 and 694. an unyielding cam-likesurfacethe rigid surface of body part 695-and a yielding surface ofspring 701, adapted to act upon the four needle-threads in the mannerillustrated in Figs 7 to 10 inclusive. In this succession of views, therotary take-up is shown in clifferent positions corresponding todifferent operative positions of the needles. In each view the dottedline 702 indicates the ap proximate position of the upper surface of thethroatlate.

In Fig. the needles are in their uppermost position, about to begin adown.stroke,. and the rotary take-up has exerted its maximum pull orpressure upon the threads to tighten the last stitch of each needle bytaking up slack thread, and also to pull sufii cient threadin additionto the slack through the tensions for the succeeding stitch.

Fig. 8 the needles have moved down the taut threads and their eyes areabout to enter the work. The threads now extend through theirrespectivenotches 699,,and.

plate (shown in other figures of the draw-v ings) which act upon thecross-thread. As the eyes of the needles pass through and below thework, the thread must be very rapidly supplied for formation of theneedle loops below the work. This supply of thread is rendered possibleby the pull on the thread bending the spring 701 inward toward the axisof rotation of the take-up to the limit of its movement, as shown inFig. 9, the needle-thread in this position of the parts passing morenearly in a direct line between the thread-guiding hooks 671 and 67 2.In the position of the parts shown in Fig. 10, the needles are about tobegin their ascending movement. It will thus be seen that the principalfunctions of the spring 701 are to retard the loosening of the threadsafter the unyielding part of the take-up passes its point of maximumpressure upon the threads, and to provide a continued pressure upon thethreads which prevents slack but yields to supply thread to theformation of the loops while the needles project through the work.

What I claim is:

1. A rotary take-up having an unyielding part adapted to act upon thethread to take up the same, and a yielding part in the form of a springadapted to press outward against the thread but to be bent inward towardthe axis of rotation of the take-up by pull on the thread.

2. A rotary take-up having side plates Copies of this patent may beobtained for five cents each, by addressing the Gommissioner of Patents,I

Washington, I). C.

-andraiflat spring in the space between the plates adapted to pressoutward against the A rotary take-up having in its surface whichcontacts with the thread a cam-like part followed by a yieldingportionconstituting a continuation of said cam-like part. 4. A rotary take-upfor simultaneously operating upon a plurality of threads hav ing acam-like part for acting upon the threads to take up the same, followedby one or more fingers with intervening slots, said fingers beingadapted to projectbetween and separate the threads, and yielding meansunder said slots adapted to be engaged by the threads passing throughthe slots and to yield to pull upon said threads.

5. A rotary take-up for simultaneously operating upon a plurality ofthreads having a cam-like part for acting upon the threads to take upthe same, followed by one or more fingers extending beyond the cam-likepart and separated by intervening slots, said fingers being adapted bythe rotation of the take up to be projected between and separate thethreads, and a flat spring extending from its fixed end along and incontact with the under surface of the fingers and under said slots andadapted to be engaged by the threads passing through the slots and toyield to pull upon said threads.

6. A rotary take-up for simultaneously operating upon a plurality ofthreads having one or more fingers with intervening slots, said fingersbeing adapted to project between and separate the threads, and yieldingmeans under said slots adapted to be engaged by the threads passingthrough said slots and to yield to pull upon saidthreads.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

' ARTHUR A. MERRITT. lVitnesses:

H. A. WV. HAY ARD, BURTON V. MORSE.

